Aliens vs Predator Mechanics: Infection and Evolution

The biological systems are the core of the mod's difficulty.

Infection

When a player is impregnated by a Facehugger, they receive the Infection debuff.

• Gestation: Lasts 5 minutes. During this time, the player may experience nausea and slowness
• Removal: The embryo can only be removed using a Medical Medpod or by death (which spawns the Chestburster at the death location)

Evolution and Royal Jelly

Royal Jelly is a rare drop from high-tier Xenomorphs. It has several uses:

• Evolution: Feeding Royal Jelly to a Drone can force it to evolve into a Praetorian or Queen
• Healing: It can be used to instantly heal Xenomorphs or provide a powerful regeneration effect to players (at the cost of potential side effects)